update README for ImputationBeagle

Author: mmorgantaylor

pipelines/broad/arrays/imputation_beagle/README.md

@@ -1,6 +1,6 @@
 ### ImputationBeagle summary
 
-The ImputationBeagle pipeline imputes missing genotypes from a multi-sample VCF using the [Beagle imputation tool](https://faculty.washington.edu/browning/beagle/beagle.html) and a large genomic reference panel. Overall, the pipeline filters, phases, and performs imputation on a multi-sample VCF. 
+The ImputationBeagle pipeline imputes missing genotypes from a multi-sample VCF using the [Beagle imputation tool](https://faculty.washington.edu/browning/beagle/beagle.html) and a large genomic reference panel. Overall, the pipeline filters, phases, and performs imputation on a multi-sample VCF. This pipeline was created for use by the All of Us/AnVIL Imputation Service
 
 ### ArrayImputationQuotaConsumed summary